The Lord has used the enemies of Israel to serve His purposes before…later he used Nebuchadnezzar of Babylon to enslave the southern kingdom…here Isaiah talks about the Northern kingdom, and how they fell so rapidly into idolatry and hypocrisy…sound familiar, America?
“O Assyrian, the rod of mine anger, and the staff in their hand is mine indignation. I will send him against an hypocritical nation, and against the people of my wrath will I give him a charge, to take the spoil, and to take the prey, and to tread them down like the mire of the streets” (Isaiah 10:5-6)